Repeating cut-out construction



g 6, 4 w. o. SCHULTZ ET AL, v fi REPEATING: CUT-OUT CONSTRUCTION Filed Sept. '11, 1936 3 Sheets-Sheet 1 J INVENTORS Mum/ 1 0. Swuzrz Alla/Ml 6. firm/MAYER ORNEY.

gw. o. SCHULTZ ET AL 2. 0502 REPEATIIG CUT-OUT CONSTRUCTION Filed Sept. 11, 1936 3 Sheets-Sheet 5 INVENTOR5 W/zu/w 0 Swuzrz flum/ 6. SrE/A/MA YE/F Patented Augj6, 1940 UNITED, STATES REPEATING CUT-OUT CONSTRUCTION William 0. Schultz, South Milwaukee. and Alwin G. Steinmayer, Milwaukee, Wis., assignors to Line Material Company,

South Milwaukee,

Wis., a corporation of Delaware Application September 9 Claims.

This invention relates to a repeating cut-out construction.

Objects of this invention are to provide a repeating cut-out, such as a repeating fuse for 6 example, which is so made that when a fuse link is ruptured, a wide separation of the parts is automatically obtained, and in which a successive fuse unit or cut-out is automatically thrown into'circuit after a predetermined int'erval of time.

Further objects are to provide a repeating cutout construction which is automatic in its operation, and in addition to performing the functions hereinabove noted, throws away any unburned portion of the fuse link, such as the leaders for instance, and in which an automatic switch having a wiping contact is provided and utilizes one of the arms which normally carries one end of a fuse link, the device being so constructed that material distance apart by an insulator and a relatively long leakage path is provided between opposite terminals of the device.

This invention is an improvement over that disclosed in the copending application of Robert L. Smythe, Serial No. 72,044, filed April 1, 1936, for Repeating cut-out constructions, now Patent No. 2,155,959, issued April 25, 1939. I

Further objects are to provide a construction in which a single insulator is employed for mounting the respective contact parts, thus eliminating the necessity of an insulating cross-arm, in which a removable switch arm is employed, in which all of the arms of the device may be 35 easily renewed, and in which a wiping contact is obtained between the. movable portion of the switch and the relatively stationary portion thereof.

Further objects are to provide a construction 40 in which a very simple mode of mounting is obtained, in which a sleet hood is provided for the timing mechanism for the switch and is carried by the single insulator, and inwhich the maximum simplicity is obtained although the device is wholly automatic in its operation.

Embodiments of the invention are shownin the accompanying drawings, in which:

Figure 1 is a side elevation of the device with parts in section.

Figure 2 is an enlarged view of the upper portion of the device with the sleet hood broken away and with parts in section.

Figure 3 is a sectional view on the line 3-3 of Figure 2.

the arms that carry the fuse link are spaced a 11, 1936, Serial No. 100,268

Figure 4 is a view looking down on the top of the device with, however, the lower portion omitted from the showing for the sake of clearness.

Figure 5 is a view of the lower portion of the device with the insulator in section.

Figure 6 is a view approximately on the section line 6--6 of Figure 1.

Figure 7 is a view corresponding to Figure 4 showing a modified form of the invention.

Referring to the drawings, it will be seen that the device comprises a main body portion which is in the form of an elongated insulator l of porcelain or other suitable material and which is preferably provided with a plurality of petticoats to increase the leakage path from the upper to the lower terminal. Approximately, the middle portion of the insulator is slightly reduced in diameter and receives any form of supporting means, such as the clamping members 2 and 3, from which a supporting arm 4 projects and is adapted to extend to any suitable form of support not shown.

The lower portion of the insulator l is provided with a cylindrical portion 5 which is grooved and receives the U-bolt 6. The ends of the U-bolt pass through the saddle like support 1, see Figures 1 and 5, and through the bottom bar or terminal member 8, the ends of the U -bolt being threaded and receiving the clamping nuts 9.

A pair of terminal members 10 are carried by the terminal bar 8 and are each provided with hooked ends H adapted to receive the looped leaders of fuse links, as will hereinafter be described.

Each of the terminal members l may consist of phosphor bronze or other spring wire and is U-shaped or v-'shaped and has its ends attached to the terminal member or bar 8 by means of screws l3. Preferably a coiled or looper portion I2 is provided adjacent the attached ends of the terminal members It) to afford additional resiliency. Preferably the terminal bar or member 8 is apertured, as indicated at M, to receive a connector so that a line wire may be attached thereto, such connector and line wire being omitted for the sake of clearness.

A pair of upper terminal members l and I6 Y are provided. The terminal member l6 may be substantially stationary if desired and the terminal member I5 is spring urged upwardly.

These terminal members are respectively provided with hooked ends I! and I8.

The terminal member It may be a heavy rod like member and is secured by means of a U-bolt l9 fitting within a groove intermediate the ends of the insulator or body portion I, but preferably closely adjacent the upper end thereof. The U-bolt 09 extends through a saddle like support 20 similar to the support 1 previously described and bearing against the cylindrical portion 20' of the insulator. An intermediate portion2l is clamped between a clamping plate 22, see Fig ure 1, and the support 20, nuts 23 being provided on the outer ends of the U-bolts. The rod or bar forming the members l6 and 2| continues outwardly and upwardly to form the contact arm 24, see Figures 1 and 6, and this contact arm is provided with a transversely extending contact portion 25 arranged in the path of travel of the movable terminal member I5.

A fuse link joins one of the lower terminal members I with the movable terminal member 15. A fuse link also extends between the other lower terminal member I0 and the stationary upper terminal member I6. In each instance the lower terminal members are flexed or drawn upwardly to the full line position shown in Figure 1 and when released, spring downwardly to the lowerdotted line position indicated in Figure 1.

These fuse links may comprise a fusible portion 26 enclosed within a non-combustible insulating sheath 21. Looped leaders 28 and 29 extend outwardly from the fusible member and are hooked over the hooks of the terminal members. The terminal members III are thus placed in tension and the terminal member l5, which is spring urged upwardly, is held in its lowermost position as shown in full lines in Figure 1.

The terminal member 15 projects from a sleet hood 30 which is clamped to the upper cylindrical portion 3| of the insulator I by means of a U- bolt 32, seated within a groove formed in the insulator I. Preferably a saddle like supporting portion 33 is formed integrally with the sleet hood 3!) and seats against the cylindrical portion 3| of the insulator.

The sleet hood is preferably provided with an eyelet portion 34 which is adapted to receive a connector and thereby to be attached to a line wire, the connector and line wire being omitted for the sake of clearness.

A rocking cam member 35 is pivotally mounted upon a pin 36. It carries an integral web or transverse portion 31' to which the movable terminal member I is removably secured, as by means of screws 38, see Figure 2. The rocking cam member is urged in a counterclockwise direction by means of the relatively heavy spring 39. Preferably this rocking cam member has duplicate side portions connected by the transverse web 31, which is most clearly shown in Figure 3. These side portions are each provided with faces 40 which constitute stops and are adapted to abut the transverse pin 4| to limit the downward rocking of the movable arm I5 and this pin also forms one of the anchor points for one end of the spring 39, see Figure 2. The other end of the spring 39 is hooked beneath the transverse web 31, as shown most clearly in Figure 3.

A bearing face or cam portion 42 is formed on each of the side members of the rocking cam 35 and bears against pins 43 carried by the forward head 44 of an expansible metal bellows 45. The top of the cam portion is rounded, as indicated at 46 in Figure 2, so that as the movable member l5 slowly rocks upwardly, being restrained by the bellows in a manner hereinafter to appear, at

a definite point the corner between the rounded face 46 and the bearing face 42 will pass the pin 43 and thereafter the movable arm will not be further retarded by the time delay bellows but instead will thereafter quickly snap upwardly and will thus engage the contact arm 25, see Figure 6, with a quick closing stroke. There is a slight yield in the contact arm formed jointly by the portions 24 and 25 and thus a slight scraping or cleaning action occurs at each time that the contact is made.

The front head 44 of the bellows is supported by a U-shaped rocking supporting member 41 pivotally mounted upon the pin 48 and receiving the pins 43, as shown in Figures 2 and 3.

The bellows is provided with a rear. head 49 which is formed with a relatively deep groove 50 within which a pair of parallel pins 5! loosely pass, the pins 5| being carried by the sleet hood 30. The bellows is thus loosely carried between the pins 5|. A spring 52 is positioned within the bellows 45 and tends to expand the bellows.

A storage bellows 53 is carried by the rear head 49 and receives the liquid discharged from the bellows 45, the liquid passing through a small aperture 54 formed in the rear wall of the bellows 45. This provides a time delay means as the bellows will slowly close under the action of the spring 39 when the terminal member [5 is released upon the blowing of its fuse link. Any suitable liquid may be employed in the bellows.

The modified form shown in Figure '1 is similar to that previously described except that the movable terminal member 15' corresponding to the member 15 of the previously described form is set at an angle and the stationary contact 25 for engagementthereby is also set at an angle. This gives a slightly greater separation between the upper terminal member [5 and the other upper terminal member [6.

The operation of the apparatus is as follows: The fuse link carried between the right hand lower terminal member [0, as viewed in Figure 6, and the upper terminal member 15 is connected in the line as one line wire is connected to the sleet hood 30 and the other line wire to the lower contact bar or terminal 8. If an overload occurs, the fuse blows and the movable terminal member. I5 is released and starts to move upwardly under the action of its spring, thus compressing the bellows 45 of the time delay mechanism, see Figure 2.

The spring 39 is a relatively =heavy spring and easily overcomes the spring 52, see Figure 3. However, the time delay mechanism delays the upward motion of the terminal member 15 as the liquid within the bellows 45 has to pass through the relatively small orifice 54. Obviously the device could be so made that air could be substituted for the liquid in the time delaybellows, but it is found more advantageous to em ploy a liquid as it is substantially incompressible and consequently the design of the bellows does not have to allow for any compressibility under these conditions. Any remaining unburned portion of the lower leader is thrown outwardly from the hook H of the lower terminal member due to the downward spring action of such member. Additionally a'very quick separation occurs when the fuse is ruptured due to this spring action and consequently there is very little tendency for the arc to persist,

The upper terminal member 15 moves upwardly until the rounded portion 45 of the cam, see Figure 2, rides past the pin 43. and then the terminal member I makes a quick upward final stroke and engages the relatively stationary contact 24-25.

It will be seen from Figure 1 that a scraping action occurs and thus cleaning of these parts is obtained. The stationary-contact 24 is electrically connected to, and in the form shown, integral with the upper terminal member l6 and consequently the line is now connected through the remaining fuse link between such upper terminal member l6 and the corresponding lower terminal member "I. v

If the fault is only a temporary one, it may have substantially immediately cleared itself, and due to the delayed action of the device, the second fuse is thrown into the circuit after an appreciable interval of time and consequently if the fault has cleared itself, such second fuse will not blow.

On the other hand, if the fault still persists, the second fuse will blow and thereby open the line. In either event it is a relatively simple matter to refuse the device as the fuse link may be hooked over the hook ll of the lower terminal member and the switch rod or switch stick may support the fuse link by having its end positioned within the upper leader of the fuse link. Thereafter the lower terminal member is flexed beyond its normal position and the upper leader is hooked over the corresponding upper terminal member.

In the event that only the first fuse link has blown, it is obvious that this procedure will not open the circuit until after the'switch has been released from the upper leader of the fuse link and the fuse link is allowed under the spring action of the lower terminal member ID to draw the movable contact l5 downwardly into its normal position.

It will be seen that great simplicity has been obtained by this invention and that only-one insulator is required. By means of this construction it is not necessary to have a transversely extending upper insulating bar to electrically separate and mechanically carry the upper terminal members.

It is obvious that the switch arm or movable terminal member is removable and may be renewed; Further than this, any of the terminal members may be easily renewed, in the event that they become damaged.

It will be seen that a very simple and reliable repeating fuse construction has been provided by this invention and one that may be relatively cheaply manufactured and easily refused.

Although this invention has been described in considerabledetail, it is to be understood that the description is intended as illustrative rather than limiting, as the invention may be variously embodied and is to be interpreted as claimed.

We claim:

1. A fuse construction comprising an insulating body portion, a conducting member adjacent one end of said body portion, terminal members projecting therefrom, a sleet hood constituting a conducting member carried adjacent the other end of said insulating body portion, a movable terminal member projecting from said sleet hood, spring means urging said movable terminal member in a direction away from said first mentioned terminal members, time delay means mounted within said sleet hood for delaying the motion of said movable terminal member, an intermediate conducting member spaced from said sleet hood and carried by said insulating body portion, a terminal member projecting from said intermediate conducting member, a conducting arm arranged in the path of travel of said movable terminal member and electrically connected to said intermediate conducting member, and fuse links interposed between said first mentioned terminal members and said movable and last mentioned terminal members, said movable terminal member being normally held from engagement with the conduating arm by the corresponding fuse link.

2. A fuse construction comprising an insulating body portion, a conducting member adjacent one end of said body portion, terminal members projecting therefrom, a sleet hood constituting a conducting member carried adjacent the other end of said insulating body portion, a movable terminal member projecting from said sleet hood, spring means urging said movable terminal member in a direction away from said first mentioned terminal members, time delay means mounted within said sleet hood for delaying the motion of said movable terminal member, an intermediate conducting member spaced from said sleet hood and carried by said insulating body portion, a terminal member projecting from said intermediate conducting member, a conducting arm arranged in the path of travel of said movable terminal member and electrically connected to said intermediate conducting memher, and fuse links interposed between said first ducting arm having a slight motion when engaged by said movable terminal member where'- by a scraping action occurs when said conducting arm is engaged by said movable terminal member, said movable terminal member being normally held from engagement with the conducting arm by the corresponding fuse link.

3. A fuse construction comprising an insulating body portion, a conducting member adjacent one end of said body portion, terminal members projecting therefrom, a sleet hood constituting a conducting member carried adjacent the other end of said insulating body portion, a movable terminal member projecting from said sleet hood, spring means urging said movable terminal membeer in a direction away from said first mentioned terminal members, time delay means mounted within said sleet hood for delaying the motion of said movable terminal member, an intermediate conducting member spaced from said sleet hood and carried by said insulating body portion, a terminal member projecting from said intermediate conducting member, a conducting arm arranged in the path of travel of said movable terminal member and electrically connected to said intermediate conducting member, and fuse links interposed between said first mentioned terminal members and said movable and last mentioned terminal members, each of said conducting members being directly secured to said insulating body portion, said movable terminal member being normally held from engagement with the conducting arm by the corresponding fuse link.

4. A fuse construction comprising an insulating body portion, a conducting member adjacent one end of said-body portion, terminal members projecting therefrom, 'a sleet hood constituting a conducting member carried adjacent the other end of said insulating body portion, a'movable terminal member projecting from said sleet hood,

spring means urging said movable terminal member in a direction away from said first mentioned terminal members, time delay means mounted within said sleet hood for delaying the motion of said movable terminal member, an intermediate conducting member spaced from said sleet hood and carried by said insulating body portion, a terminal memberprojecting from said intermediate conducting member, a conducting arm arranged in the path of travel of said movable terminal member and electrically connected to said intermediate conducting member, and fuse links interposed between said first mentioned terminal members and said movable and last mentioned terminal members, each of said conducting members including a saddle like portion and a U- bolt directly securing the conducting members to said body portion, said movable terminal member being normally held from engagement with the conducting arm by the corresponding fuse link.

5. A fuse construction comprising an insulating body portion, a conducting member adjacent one end of said body portion, terminal members projecting therefrom, a sleet hood constituting a conducting member carried adjacent the other end of said insulating body portion, a movable terminal member projecting from said sleet hood, spring means urging said movable terminal member in a direction away from said first mentioned terminal members, time delay means mounted within said sleet hood for delaying the motion of said movable terminal member, an intermediate conducting member spaced from said sleet hood and carried by said insulating body portion, a terminal member projecting from said intermediate conducting member, a conducting arm arranged in the path of travel of said movable terminal member and electrically connected to said intermediate conducting member, and fuse links interposed between said first mentioned terminal members and said movable and last mentioned terminal members, said time deiay means releasing said movable terminal member adjacent the outermost portion of its stroke whereby said movable terminal member will engage said conducting arm with a quick closing stroke, said movable terminal member being normally held from engagement with the conducting arm by the corresponding fuse link.

6. A fuse construction comprising an insulating body portion, a conducting member adjacent one end of said body portion, terminal members projecting therefrom, a sleet hood constituting a conducting member carried adjacent the other end of said insulatingbody portion, a movable terminal member projecting from said sleet hood, spring means urging said movable terminal member in a direction away from said first mentioned terminal members, time delay means mounted within said sleet hood for delaying the motion of said movable terminal member, an intermediate conducting member spaced from said sleet hood and carried by said insulating body portion, a terminal member projecting from said intermediate conducting member, a conducting arm arranged in the path of travel of said movable terminal member and electrically connected to said intermediate conducting member, and fuse links interposed between said first mentioned terminal members and said movable and last mentioned terminal members, said first mentioned terminal members being resilient and being held in tension by said fuse links, said movable terminal member being normally held from engagement with the conducting arm by the corresponding fuse link.

.7. A fuse construction comprising an insulating body portion, a conducting member adjacent one end of said body portion, terminal members projecting therefrom, a sleet hood constituting a conducting member carried adjacent the other end of said insulating body portion, a movable terminal member projecting from said sleet hood, spring means urging said movable terminal member in a direction away from said first mentioned terminal members, time delay means mounted within said sleet hood for delaying the motion of said movable terminal member, an intermediate conducting member spaced from said sleet hood and carried by said insulating body portion, a terminal member projecting from said intermediate conducting member, a conducting arm arranged in the path of travel of said movable terminal member and electrically connected to said intermediate conducting member, and fuse links interposed between said first mentioned terminal members and said movable and last mentioned terminal members, each of said conducting members including'a saddle like portion and a U-bolt directly securing the conducting members to said body portion, said body portion having annular grooves for the reception of said U-bolts, said movable terminal member being normally held from engagement with the conducting arm by the corresponding fuse link.

8. A repeating cut-out construction comprising an elongated insulating body portion, a first conducting member located adjacent one end thereof, a pair of arms projecting outwardly from said first conducting member and terminating in fuse link receiving means, a second conducting member adjacent the other end of said elongated insulating member and having an arm projecting outwardly from said second conducting member and provided with fuse link receiving means, a fuse link carried betweenv the fuse link receiving means of one of said first mentioned arms and said last mentioned arm, a relatively stationary contact carried by said second conducting member and electrically connected to said second conducting member, a

third conducting member mounted adjacent the last mentioned end of said insulating body portion and spaced from said second conducting member and being axially approximately in line therewith, a movable arm carried by said third conducting member, means biasing said arm for motion in a direction away from said first mentioned arms, said movable arm having fuse link receiving means adjacent its outer end and having a portion adjacent said outer end arranged to contact with the said relatively stationary contact, time delay means restraining the outward motion of said movable arm, and a fuse link having opposite ends connected to the fuse link receiving means of the other of said first mentioned pair or arms and to the fuse link receiving means of said movable arm.

9. A repeating cut-out construction comprising an elongated insulating body portion, a first conducting member located adjacent one end thereof, a pair of arms projecting outwardly from said first" conducting member and terminating in fuse link receiving means, a second conducting member adjacent the other end of said elongated insulating member and having an arm projecting outwardly from said second conducting member and provided with fuse link receiving means, a fuse link carried between the fuse link receiving means of one of said first mentioned arms and said last mentioned arm, a relatively stationary contact carried by said second conducting member and electrically con nected to said second conducting member, a third conducting member mounted adjacent the last mentioned end of said insulating body portion and spaced from said second conducting member and being axially approximately in line therewith, a movable arm carried by said third conducting member, means biasing saidarm for motion in a direction away from said first mentioned arms, said movable arm having fuse link receiving means adjacent its-outer end and having a portion arranged to contact with the said relatively stationary contact, time delay means restraining the outward motion of said movable arm, and a fuse link having opposite ends connected to the fuse link receiving means of the other of said first mentioned pair of arms and to the fuse link receiving means of said movable arm.

WILLIAM O. SCHULTZ.

ALWIN G. STEINMAYER. 

